Index: src/ch/UpdaterDlg.h
===================================================================
diff -u -r12ee49f6bf1f8921500ee2078e0a8c2d7b6d2a45 -rb26ced3298e3e7e51d91f3ac70b56746786da83b
--- src/ch/UpdaterDlg.h	(.../UpdaterDlg.h)	(revision 12ee49f6bf1f8921500ee2078e0a8c2d7b6d2a45)
+++ src/ch/UpdaterDlg.h	(.../UpdaterDlg.h)	(revision b26ced3298e3e7e51d91f3ac70b56746786da83b)
@@ -22,7 +22,7 @@
 	};
 
 public:
-	CUpdaterDlg(bool bBackgroundMode, CWnd* pParent = nullptr);   // standard constructor
+	explicit CUpdaterDlg(bool bBackgroundMode, CWnd* pParent = nullptr);   // standard constructor
 	virtual ~CUpdaterDlg();
 
 	BOOL OnInitDialog() override;